dozens of world leaders are expect to honor his contributions to the world. president obama will join in those celebrations. chris cuomo has made his way to south africa. he is outside mandela's home this morning. so glad to see you there. maybe you can set the scene for us what you're seeing and feeling on the ground there, chris. >> reporter: i have to tell you, the long good-bye is in full effect. it just continues to grow. we are here outside nelson mandela's home in johannesburg. the singing and dancing and memorials grow. the archbishop said the greatest memorial for mandel are the people and what we are seeing. what they call the rainbow nation here. so many different nations and faces and faiths joining in song and remembrances in honor of nelson mandela. not since john paul, ii departed have we seen energy like this around the world. billions of members in the catholic church. for nelson mandela a politician and to get this attention, people streaming in and flooding to try to get to south africa is unheard of. now the big moment will be the memorial